CHAPTER 5
REFERENCE GUIDE
EFD1000/500 MFD Pilot’s Guide
Page 5-56
091-00006-001 REV B
EFD1000/500 MFD Pilot’s Guide
Page 5-57
091-00006-001 REV B
Terrain data color coding and display is based on the difference between the terrain
height (MSL) and the aircraft height (MSL) as shown in
Table 5-18
. The relative terrain
height is determined by computing the altitude difference between the terrain height
and the computed Baro Corrected Altitude. The alerts displayed are advisory only, not
for primary terrain avoidance.
Relative Terrain Height
Color Code
100’ below and higher
RED
100’ - 500’ below
YELLOW
500’ - 1500’ below
DARK GREEN
1500’ - 2500’ below
LIGHT GREEN
More than 2500’ below
BLACK
Data unavailable
CYAN
Table 5-18 Terrain Color Coding
The current height above ground (AGL), as computed from ownship altitude and
terrain height directly below the aircraft, is shown in the AGL box in the lower right of
the display. The AGL values are rounded down to the next hundreds of feet (i.e., 899’ is
rounded to 800’). The AGL will:
•
Be removed if GPS position data is not available.
•
Display dashes if there is no terrain coverage.
•
Display dashes if the AGL value is above 50,000 ft or below 500 ft.
When the GPS sensor providing position information for terrain awareness fails or
becomes invalid, the terrain awareness function fails. The annunciation GPS1, GPS 2
or RSM GPS is displayed in amber on the center left of the display. The TERRAIN FAIL
annunciation is displayed in amber when the GPS position, altitude, heading and GPS
Track data are invalid. In addition, the AGL field, orientation annunciations, and range
display are removed. If the Jeppesen Database is invalid or unavailable, cyan coloring is
used to depict unavailable data in place of the terrain data.
NOTE
When the aircraft latitude is greater than 75° North or
60° South, terrain data is not displayed.
NOTE
If the aircraft is partially outside of the terrain coverage
provided by the database, unavailable terrain data is
shown in Cyan.
CAUTION
Correct barometric pressure is essential to accurate
terrain depiction.
NOTE
If the current heading is invalid or unavailable the map
is oriented to the current GPS ground track and TRK
UP displays in the upper right corner of the display the
current track is displayed in the upper middle of the
display.